Abstract
The purpose of this research is to produce an optimal water distribution system for irrigation of rainfed land. The problem with conventional irrigation systems is that the water distribution process cannot be controlled and monitored automatically and in real time. The impact on water distribution becomes ineffective. The implementation of Ant Colony Optimization (ACO) is used in research as a method to determine the location or node based on the pheromone pattern of the soil dryness level at the sprinkler nodes to be distributed by the water flow, taking into account the criteria level on the soil as a trend of probability values ??and determining the nodes according to the needs in the flow water. The results obtained from this study indicate that the data displayed is the level of dryness of each node, the volume of water in the reservoir, and the flow of water flowing. The ACO test shows the sequence of nodes that will be passed after the optimization process of water distribution in a rainfed irrigation system using the ACO method gets an error value calculated by the MAPE method of 43% so that it gets an accuracy value of 57%.
Highlights
ABSTRAK Tujuan dari penelitian ini untuk menghasilkan sistem distribusi air pada irigasi lahan tadah hujan dengan optimal
The problem with conventional irrigation systems is that the water distribution process cannot be controlled and monitored automatically and in real time
The implementation of Ant Colony Optimization (ACO) is used in research as a method to determine the location or node based on the pheromone pattern of the soil dryness level at the sprinkler nodes to be distributed by the water flow, taking into account the criteria level on the soil as a trend of probability values and determining the nodes according to the needs in the flow water
Summary
Pertanian lahan tadah hujan membutuhkan sistem distribusi air irigasi yang baik. Pertanian adalah penggunaan utama air tawar, dan mengkonsumsi 70% air tawar, yaitu 1500 miliar m3 dari 2500 miliar m3 dari air digunakan setiap tahun [1]. Tahapan metode ACO, dengan skala kebutuhan air akan dijadikan sebagai nilai pheromone [ti,j]α, dan invers dari panjang pipa akan dijadikan nilai visibilitas [ηi,J]β. Dibawah ini nilai pheromone yang sudah disesuaikan dengan kondisi kebutuhan air pada tanah, disertai juga nilai visibilitas yang telah ditentukan sebelumnya. Setelah nilai probabilitas terakhir adalah 1, dan setiap node juga telah dilewati atau masuk dalam memori, maka pencarian telah selesai, dalam memori jika node yang dilalui oleh air ini berdasarkan tingkat kekeringan tanah atau kebutuhan air pada tanah adalah D-C-B-E, yang disajikan pada Tabel 3. Karena resevoir yang digunakan pada penelitian ini berupa tandon yang berada pada ketinggian, maka dibutuhkan gaya grafitas untuk turun ke tiap node, sehingga bisa dihitung tekanan hidrostatis dengan persamaan:. Sehingga salah satu masalah yang terjadi pada pengaliran distribusi air irigasi secara konvensional yaitu pendistribusian air yang tumpang tindih dapat dipecahkan
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